unable to save ingame: monster hunter freedom unite.

[Gurlok]

Ah I see, you can't do too much then, you have to choose between using the in game save or continue relying on savestate. In all honestly, if I were you I would ditch the latter for a plenty of reasons, like being likely unable to load the savestate on a newer build, and a bunch of bugs that can pop up (like the one you are experiencing first hand).